It's typically better to just open a link to Google maps instead of embedding it. To embed it you'll have to load Google API and use their API to render and inline map. This will cause Google to bloat your profiles with tracking codes and a bunch of other nonsense that will, guaranteed, slow your pages down. GJ Events uses a simple click link to Google maps as follows.
Addresses:
Code:
https://www.google.com/maps/place/ADDRESS_HERE_URL_ENCODED
Businesses:
Code:
https://www.google.com/maps/search/LOCATION_HERE_URL_ENCODED
Check Google API usages regarding Google Maps if you still want to embed a map. Should work fine in a Custom HTML field (you may need to ensure your WYSIWYG editor allows script elements).